Hoisting device.



Noi 864,998. `EATENTED SEPT. s, 1907.

E. J. scHM1oK.

EoIsTING DEVICE.

PPLIOTION FILED HAY 20' 1907.

2 SHEETS-SHEET l.

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No. 864,998. PATBNTED SEPT. s, 1907. l H. J.,sGHM10K.

HOISTING DEVICE.

APPLIOATION FILED HAY 20, 190'7` 2 SHEETS-SHEET 2.

NITED STATES PATENT oEEIoE.

HENRY J. SCHMICK, OF HAMBURG, PENNSYLVANIA, ASSIGNO-R TO HAMBURGMANUFACTUR- ING COMPANY, LIMITED, OF HAMBURG,` PENNSYLVANIA. i

I-IOISTING DEVICE Specification of Letters Patent.

Patented Sept. 3, 1907.

Application led May 20,1907. Serial No. 374,638.

To all whom it may concern:

Be it known that I, HENRY J. SCHMICK, a citizen of the United States,residing at Hamburg, in the county of Berks and State of Pennsylvania,have invented certain new and useful Improvements in Hoisting Devices;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to chain hoists, or hoisting devices and has forits object the construction of such a hoisting device that will maintainthe load upon it at any stage in its elevation, and the inventionconsists in certain improvements in construction which will be fullydisclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification:Figure 1 represents a vertical section partly in elevation of myimproved hoisting device. Fig. 2 an end view, partly in section. v Fig.3 a plan view of the clutch-ring detached, and Fig. 4 is an end view ofthe head with its working members.

Reference being had to the drawings and the designating charactersthereon, the numeral 1 indicates the 25 housing or casing provided witha hook 2 swiveled in a boss 3, on which the device is suspended. 4 agearwheel or hoisting member supported on a shaft 5,

which shaft is supportedwin the sides or wall of the casing in the usualmanner, and on one side of the wheel 3 0 4 is a cylindrical projectionor boss 6 on which a hoisting chain 6 is supported.

7 indicates the head, on the face of which are radio helical cams orworking members 8 which engage the teeth 9 on the gear-wheel or hoistingmember 4. The head is provided with a shaft 10 which has its bearing andrevolves in the seat 11, in the sleeve 12 and is secured to the drivingwheel 13 by a pin 14 extending through the hub 14 of said wheel and theshaft.

15 is a cap secured to the flange 16 of the housing 1, by bolts 17 andits inner surface 18 forms a bearing for the sleeve 12, at whose innerend is a fiange or collar 19 which engages a seat 20 on the cap 15 totake part of the thrust of the head 7, and at the outer end of thesleeve is a rabbet 21 in which is seated the clutch-ring 22 which isinclosed in the extension 23 of the hub 14 of the driving-wheel 13, andis provided with frictionrollers 24, in seats 25 on the clutch-ringwhich are thrown out by springs 26 and engage the wall 27 of theextension 23 of the hub and cause the sleeve 12 to revolve with thedriving-wheel in the descent of the article which has been hoisted. Theclutch-ring 22 is secured to the sleeve .12 by screw-threaded stubs 2S.The driving-wheel 13 is provided with a groove 13 in the periphery toreceive a chain, not shown, for revolving the wheel and the hoistingmember.

In hoisting, the head 7 revolves on its shaft l0, but when the operationof hoisting ceases, the weight of 'the article being hoisted causes thegear-wheel 4 to revolve in the opposite direction and carries with itthe head 7, its shaft 10, and the driving wheel 13; the friction rolls24 in the clutch-ring 22 thrown out by the springs 26 that engage thewall 27 of the hub extension 23 and lock the wheel 13 to the clutch-ringand the sleeve 12, and cause the head 7 and its shaft 1.0 to revolve onthe sleeve 12 and its bearing 18 in the cap 15, and thereby sustain theweight of the article on the hoisting chain Gf. The friction produced bythe rollers 24 engaging the wall 27 and the increased area of thebearing between the sleeve 12 and its seat 18, as compared with theshaft 10 and its bearing 11 in the sleeve 12 supports the load on thehoisting chain at any desired point.

The construction described provides two concentric bearings on which thehead 7 and its shaft revolves, one in the act of hoisting, and theother, of greatly increased area, in lowering. 29 is a stirrup securedto the housing and is provided with a tongue or bar 30 which extends upto the boss 6, and prevents the chain 6 from being carried around theboss when lifting a load, and 3l, 32 indicate guides projecting inwardfrom the wall of the housing to prevent the chain jumping off the boss.

It is obvious that changes in minor details of construction may be madewithout departing from the spirit of my invention.

Having thus fully described my invention, what I claim is f 1. In ahoisting device, a revoluble hoistingdnember, a revoluble memberengaging said hoisting-member and provided with a shaft, a sleeveprovided with a bearing for the shaft, a bearing in the casing for saidsleeve, a driving member secured to the shaft and provided with a hub,and a friction clutch connectingl said sleeve and the huh of the drivingmember.

1n a hoisting device, a revoluble hoisting-member, a revoluble disk orhead having Working members on the face thereof engaging thehoisting-member and provided with a shaft, separate concentric bearingsfor the head and its shaft, and means for revolving the disk or head.

3. In a hoisting device, a revoluble hoisting-member, a revoluble diskor head having working members thereon engaging the hoisting-member, andprovided with a shaft, a sleeve provided with a bearingfor the shaft,separate bearings for the sleeve and the shaft, a driving member, andmeans for locking said member to said sleeve..

4. In a hoisting device, a revoluble hoisting-member', a revolublemember' engaging said hoisting-member and provided with a shaft, asleeve provided with a bearing for the shaft, a bearing for the sleeve,a clutch-ring secured to said sleeve, and a driving wheel secured to theshaft and engaged by the clutch.

5. In a hoisting deviee,'a revoluble hoisting-member, a revoluble memberengaging the hoisting-member and provided with a shaft, a sleeveprovided with a bearing for the shaft, a bearing for the sleeve, aclutch-ring secured 10 to said sleeve, rollers in said ring, and adriving-Wheel provided with a hub engaged by said rollers.

In testimony whereof I ax my signature, in' presence of two Witnesses.

HENRY J. SCHMICK.

Witnesses z HARVEY C. JOHNSON, M. C. KREIDER.

